Ventilation device

Abstract

A ventilation device including a heat exchanger having thermosensitive elements each placed, respectively at the inlet of an air-feeding passage, the inlet of an air-discharging passage and the outlet of the air-feeding passage and a display unit for showing temperature detected by the respective thermosensitive elements.

I claim: 
     
       1. A ventilation device including a heat-exchanging means, said heat-exchanging means including an air-feeding passage having an inlet and an outlet and an air-discharging passage having an inlet and an outlet, comprising: a first thermosensitive element placed at said inlet of said air-feeding passage to detect an outdoor air temperature;   a second thermosensitive element placed at said outlet of said air-feeding passage such that a fed air temperature is detected after the outdoor air has been thermally conditioned by said heat-exchanging means as the outdoor air circulates through said air-feeding passage of said heat-exchanging means;   a third thermosensitive element placed at said inlet of said air-discharging passage such that a room air temperature is detected prior to the room air being thermally conditioned by said heat-exchanging means as the room air circulates through said air-discharging passage of said heat-exchanging means to exit via said outlet of said air-discharging passage; and   a display unit for showing said outdoor air temperature, said fed-air temperature and said room air temperature detected by said first thermosensitive element, said second thermosensitive element and said third thermosensitive element, respectively.   
     
     
       2. A ventilation device according to claim 1 wherein said display unit is supported by a main casing of said heat exchanger so as to be slanted in connection with the outer surface of said casing. 
     
     
       3. A ventilation device according to claim 1 wherein said first, second and third thermosensitive elements are placed so as to be slidable and retained at a desired position near said inlet of said air-feeding passage, said inlet of said air-discharging passage and said outlet of said air-feeding passage. 
     
     
       4. A ventilation device according to claim 1 wherein said first, second and third thermosensitive elements are fixedly mounted on a frame of said heat exchanging means near said inlet of said air-feeding passage, said inlet of said air-discharging passage and said outlet of said air-feeding passage.